The bolt heads are stripped, rounded and shiny, hard to get any kind of socket to stay on without slipping off, I'll keep at it and try the Heat/freeze method. Thanks again,

 

As a last resort, you can of course drill them out, though I'm not sure how easy they'll be to reach with a drill. Use a center punch to center the bit and start small, working your way wider until it flakes out of there.

 

Get a set of bolt extractors. They work miracles.

I snapped the glow plug off in the head on my old mercedes, and they saved my tookus.

If you wrench on anything, and don't own a set, I question your sanity.

amazon has best pricing on them from what I can tell.

Torch the SURROUNDING METAL, not the bolt, propane is OK, doesn't get that hot though. try a blue wrench.. (oxy/ace) and repeated PB blaster or deep creep treatments.

Sharp blow to get it started, then steady pressure.

Get some GOOD anti-sieze after that (I use nothing but liqui-moly) and new bolts.

Giddyup!